【摘要】 对五里湖淤泥现状进行了调查,表明影响五里湖水质的主要污染源是五里湖湖底的淤泥,目前淤泥平均厚度为0.6m～0.8m,淤泥量约360万t。根据淤泥中有机质、TN和TP的水平分布,有机质平均值为40.37g/kg,TP平均值为2.61g/kg,TN平均值为1.19g/kg,均超过了太湖和梅梁湖底泥中有机质、TN和TP的平均值,五里湖底泥的有机污染已相当严重。指出淤泥是湖体营养盐和污染物的聚集地和储存仓库,不断向水体释放营养物质和污染物质,淤泥所产生的的二次污染已成为五里湖湖水富营养化和藻类爆发的主要原因之一。提出为改善五里湖水质,应采用生态清淤治理五里湖淤泥污染,同时将生态清淤与交通、绿化和生态农业建设有机结合起来,合理利用清出的淤泥,提高生态清淤的综合效益。更多还原

【Abstract】 The silt state of the Wulihu Lake was investigated. The silt was the main pollution sources of the Wulihu Lake. The mean thickness of Wulihu Lake was 0.6?m～0.8?m, the silt’s weight was 36?000?000?t. The mean concentration of organic materials in silt was 40.37?g/kg, TP was 2.61?g/ kg,TN was 1.19?g/kg. All these were beyond the mean concentration in lake water to indicate that the organic pollution was serious. Silt was the warehouse of organic salt and pollutants for the lake. The second pollution caused by silt was the main reason of eutrophication and algae outbreak. To improve the water quality of the Wulihu Lake, it should undertake ecological dredging, and interlink the communication, planting and ecological agriculture.更多还原